package com.itheima.reggie.common;


import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;


import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("/common")
public class CommonController {
    @Value("${reggie.path}")
    private String basepath;

    /**
     * 文件上传
     */
    @PostMapping("/upload")
    public R<String> uplode(MultipartFile file){
    String originalFilename = file.getOriginalFilename();
    String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));


    String filename = UUID.randomUUID().toString() + suffix;

    File dir = new File(basepath);

    if ( !dir.exists())
    {
        dir.mkdirs();
    }
    try {
        file.transferTo(new File(basepath+filename));
    } catch (IOException e) {
        e.printStackTrace();
    }
    return  R.success(filename);
}

    /**
     * 下载代码
     * @param name
     * @param reponse
     */
    @GetMapping("/download")
    public void download(String name, HttpServletResponse reponse){
        try {
            FileInputStream fileInputStream = new FileInputStream(new File(basepath + name));
            ServletOutputStream outputStream = reponse.getOutputStream();
            reponse.setContentType("image/jpeg");
            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = fileInputStream.read(bytes)) != -1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }

            //关闭资源
            outputStream.close();
            fileInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }





    }

}
